Device for the time-based analysis of the agitation of a bedridden patient includes elements (4) for acquiring the patient's shouts and elements (5) for acquiring the patient's movements, the acquisition elements being connected to storage elements (9) suitable for storing the acquired data accompanied by a time stamping of the latter, the storage elements being connected to analysis and presentation elements (10) suitable for providing care staff with a representation of the frequency and duration of the patient's shouts and movements which are representative of the patient's agitation over a determined time span, characterized in that the elements for acquiring shouts include a bandpass filter (6) suitable for isolating the shouts from speech and ambient noise.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A device for a time-based analysis of the agitation of a bedridden patient comprising: means ( 4 ) for acquiring data related to the patient's shouts; and means ( 3 ) for acquiring data related to the patient's movements, the acquisition means being connected to storage means ( 9 ) suitable for storing the acquired data accompanied by time-stamping ( 8 ) of said acquired data, connected to analysis and presentation means ( 10 , 11 ) suitable for providing care staff with a representation of frequency and duration of the patient's shouts and movements which are representative of the patient's agitation over a determined time span, wherein the means ( 4 ) for acquiring data related to the shouts comprise a band-pass filter ( 6 ) suitable for isolating shouts from speech and ambient noise, the band-pass filter comprising pass-band selection means between two predetermined bandwidths, said two predetermined bandwidths having a bandwidth of approximately 1500 Hz centered on 2500 Hz for the first and a bandwidth of approximately 900 Hz centered on 1500 Hz for the second, and the means for acquiring data related to the movements comprise a sensor of the vibrations of a patient's bed and an intensity filter adapted so that only the vibrations having an intensity above a predetermined threshold are stored in the storage means.
2. The analysis device according to claim 1 , wherein the band-pass filter is a digital filter based on a Z-transform technique.
3. A method for a time-based analysis of the agitation of a bedridden patient comprising the steps of: acquisition ( 24 , 26 ) of data related to the patient's shouts; acquisition ( 20 , 22 ) of data related to the patient's movements, storage ( 28 ) of the data acquired accompanied by time-stamping of said acquired data; and analysis and presentation ( 30 ) of the time-stamped data for providing care staff with a representation of frequency and duration of the patient's shouts and movements which are representative of the patient's agitation over a determined time period, wherein the acquisition of data related to the shouts comprises a band-pass filtering substep suitable for isolating shouts from speech and ambient noise, the band-pass filtering comprising a preliminary step of pass-band selection between two predetermined bandwidths, said two predetermined bandwidths having a bandwidth of approximately 1500 Hz centered on 2500 Hz for the first and a bandwidth of approximately 900 Hz centered on 1500 Hz for the second, and wherein the step of acquisition of data related to the movements comprises a sub-step of acquisition of vibrations of a patient's bed, followed by an intensity filtering sub-step adapted such that only the vibrations having an intensity above a predetermined threshold are stored.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
September 11, 2007
June 14, 2011
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